Protective Relaying Testing For Solar Panels

A transmission line on the upper panel of the test set allows students to set up distance protection and parallel feeder tests.

Protective relaying testing for solar panels.

These tests which can last for multiple months are critical to determining the quality and performance of panels under particular environmental stresses as well as confirming they meet mandated safety requirements. Rate of change of frequency rocof protects against frequency instability when the. Testing the 12 volt solar panel. These contacts in turns close and complete the circuit breaker trip coil circuit hence make the circuit breaker tripped for disconnecting the faulty portion of the electrical circuit from rest of the healthy circuit.

Under over voltage protects against voltage fluctuations that can lead to things such as insulation damage or inefficient performance. Simply touch the solar panel leads with the multi meter probes matching their corresponding polarity red to red black to black. They enable the evaluation and comparison of different solar panel types by determining current voltage and power of solar pv panels under comparable test conditions. Under over current protects against current fluctuations by tripping when the current level goes outside of the current limits.

A relay is automatic device which senses an abnormal condition of electrical circuit and closes its contacts. The user programs the relays either directly or using software. And beyond requires a very careful assessment of the protection and isolating devices which must be able to suppress direct fault currents under high voltages. Open circuit voltage can vary depending on your solar panel but the readings we are usually looking for are in the range of 15 to 23v.

Protective relays are used extensively across the power system to remove any element from service that suffers a short circuit starts to operate abnormally or poses a risk to the operation of the system. Solar panels and generation by the strings of short circuit currents with values very near to those produced in normal conditions the presence of voltage as high as 300 600 v d c. Tecquipment supply each relay in rugged portable enclosures. As most solar panels are 12 volts the solar panel test methods are basically the same.

The relaying equipment is aided in this task by instrument transformers that sense power conditions and circuit breakers that are capable of disconnecting the faulty element when called upon. The relays rest on the desktop either end of the test set. How to test a 12 volt solar panel vs other voltages. The solar pv modules are subjected to a solar radiation of 1000 w m a module temperature of 25 c and an air mass coefficient of 1 5.

Definition of protective relay. Solar protection relay functions.